.demo {
    padding: 3em 0;
}

.main-timeline {
    padding-top: 50px;
    position: relative;
}

.main-timeline:after {
    content: "";
    display: block;
    clear: both;
}

.main-timeline .timeline {
    width: 54.2%;
    float: left;
    margin-top: -50px;
    overflow: hidden;
    position: relative;
}

.main-timeline .timeline:last-child {
    overflow: visible;
}

.main-timeline .timeline:before {
    content: "";
    width: 95px;
    height: 95px;
    border-radius: 50%;
    background: #fff;
    border: 4px solid transparent;
    border-top: 4px solid #8c51c7;
    border-left: 4px solid #8c51c7;
    position: absolute;
    top: 0;
    right: 0;
    transform: rotate(45deg);
}

.main-timeline .timeline:after {
    content: "";
    width: 65px;
    height: 100%;
    border-radius: 80px 80px 0 0;
    background: #8c51c7;
    position: absolute;
    top: 15px;
    right: 15px;
}

.main-timeline .timeline-content {
    display: block;
    padding: 0 90px 50px 15px;
    position: relative;
}

.main-timeline .timeline-content:hover {
    text-decoration: none;
}

.main-timeline .year {
    display: inline-block;
    font-size: 30px;
    font-weight: 800;
    color: #fff;
    position: absolute;
    top: 50%;
    right: 13px;
    z-index: 1;
    transform: rotate(90deg) translateX(-50%);
}

.main-timeline .timeline:last-child .year {
    top: 60%;
}

.main-timeline .title {
    padding: 10px 25px;
    margin: 0;
    font-size: 25px;
    font-weight: 800;
    color: #8c51c7;
    background: linear-gradient(to bottom, transparent, transparent, transparent, transparent, transparent, #8c51c7);
}

.main-timeline .description {
    padding: 10px 25px 25px;
    border: 4px solid #8c51c7;
    border-radius: 0 0 80px 80px;
    font-size: 17px;
    color: #000;
    letter-spacing: 1px;
}

.main-timeline .timeline:nth-child(2n) {
    float: right;
}

.main-timeline .timeline:nth-child(2n):before {
    right: auto;
    left: 0;
}

.main-timeline .timeline:nth-child(2n):after {
    right: auto;
    left: 15px;
}

.main-timeline .timeline:nth-child(2n) .timeline-content {
    padding: 0 15px 50px 90px;
}

.main-timeline .timeline:last-child .timeline-content {
    padding-bottom: 20px;
}

.main-timeline .timeline:nth-child(2n) .year {
    right: auto;
    left: 13px;
}

.main-timeline .timeline:nth-child(2n):before {
    border-top-color: #faa400;
    border-left-color: #faa400;
}

.main-timeline .timeline:nth-child(2n):after {
    background: #faa400;
}

.main-timeline .timeline:nth-child(2n) .title {
    color: #faa400;
    background: linear-gradient(to bottom, transparent, transparent, transparent, transparent, transparent, #faa400);
}

.main-timeline .timeline:nth-child(2n) .description {
    border-color: #faa400;
}

.main-timeline .timeline:nth-child(3n):before {
    border-top-color: #e86c44;
    border-left-color: #e86c44;
}

.main-timeline .timeline:nth-child(3n):after {
    background: #e86c44;
}

.main-timeline .timeline:nth-child(3n) .title {
    color: #e86c44;
    background: linear-gradient(to bottom, transparent, transparent, transparent, transparent, transparent, #e86c44);
}

.main-timeline .timeline:nth-child(3n) .description {
    border-color: #e86c44;
}

.main-timeline .timeline:nth-child(4n):before {
    border-top-color: #45a137;
    border-left-color: #45a137;
}

.main-timeline .timeline:nth-child(4n):after {
    background: #45a137;
}

.main-timeline .timeline:nth-child(4n) .title {
    color: #45a137;
    background: linear-gradient(to bottom, transparent, transparent, transparent, transparent, transparent, #45a137);
}

.main-timeline .timeline:nth-child(4n) .description {
    border-color: #45a137;
}

@media only screen and (max-width: 1200px) {
    .main-timeline .timeline {
        width: 55.1%;
    }
}

@media only screen and (max-width: 990px) {
    .main-timeline .timeline {
        width: 56.5%;
    }

    .main-timeline .title {
        font-size: 20px;
    }
}

@media only screen and (max-width: 767px) {
    .main-timeline {
        padding-top: 0;
    }

    .main-timeline .timeline {
        width: 100%;
        float: none;
        margin: 0 0 -30px 0;
    }

    .main-timeline .timeline:before {
        right: auto;
        left: 0;
    }

    .main-timeline .timeline:after {
        right: auto;
        left: 15px;
    }

    .main-timeline .timeline-content {
        padding: 0 15px 50px 90px;
    }

    .main-timeline .year {
        right: auto;
        left: 13px;
    }
}

@media only screen and (max-width: 479px) {
    .main-timeline .title {
        padding: 5px 5px 5px 15px;
        font-weight: 600;
    }

    .main-timeline .description {
        padding: 5px 20px 20px;
        font-size: 14px;
        text-align: justify;
    }
}